2GIS - Header Asymmetric Unit

HEADER RNA 29-MAR-06 2GIS

TITLE STRUCTURE OF THE S-ADENOSYLMETHIONINE RIBOSWITCH MRNA TITLE 2 REGULATORY ELEMENT

COMPND MOL_ID: 1; COMPND 2 MOLECULE: SAM-I RIBOSWITCH; COMPND 3 CHAIN: A; COMPND 4 ENGINEERED: YES

SOURCE MOL_ID: 1; SOURCE 2 SYNTHETIC: YES; SOURCE 3 OTHER_DETAILS: THIS SEQUENCE WAS ENGINEERED BASED ON THE SOURCE 4 SAM-I RIBOSWITCH FROM THE METF-METH OPERON IN SOURCE 5 THERMOANAEROBACTER TENGCONGENSIS

KEYWDS MRNA, RIBOSWITCH, S-ADENOSYLMETHIONINE, SAM, RNA-LIGAND KEYWDS 2 COMPLEX

EXPDTA X-RAY DIFFRACTION

AUTHOR R.K.MONTANGE,R.T.BATEY

REVDAT 2 24-FEB-09 2GIS 1 VERSN REVDAT 1 04-JUL-06 2GIS 0

JRNL AUTH R.K.MONTANGE,R.T.BATEY JRNL TITL STRUCTURE OF THE S-ADENOSYLMETHIONINE RIBOSWITCH JRNL TITL 2 REGULATORY MRNA ELEMENT. JRNL REF NATURE V. 441 1172 2006 JRNL REFN ISSN 0028-0836 JRNL PMID 16810258 JRNL DOI 10.1038/NATURE04819

REMARK 1

REMARK 2 REMARK 2 RESOLUTION. 2.90 ANGSTROMS.

REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : CNS 1.1 REMARK 3 AUTHORS : BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE- REMARK 3 : KUNSTLEVE,JIANG,KUSZEWSKI,NILGES, PANNU, REMARK 3 : READ,RICE,SIMONSON,WARREN REMARK 3 REMARK 3 REFINEMENT TARGET : ENGH & HUBER REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 2.90 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 49.32 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 DATA CUTOFF HIGH (ABS(F)) : 441185.100 REMARK 3 DATA CUTOFF LOW (ABS(F)) : 0.0000 REMARK 3 COMPLETENESS (WORKING+TEST) (%) : 99.3 REMARK 3 NUMBER OF REFLECTIONS : 13415 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : THROUGHOUT REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOM REMARK 3 R VALUE (WORKING SET) : 0.266 REMARK 3 FREE R VALUE : 0.289 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 7.400 REMARK 3 FREE R VALUE TEST SET COUNT : 999 REMARK 3 ESTIMATED ERROR OF FREE R VALUE : 0.009 REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : 6 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 2.90 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 3.08 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 98.90 REMARK 3 REFLECTIONS IN BIN (WORKING SET) : 2056 REMARK 3 BIN R VALUE (WORKING SET) : 0.4270 REMARK 3 BIN FREE R VALUE : 0.4160 REMARK 3 BIN FREE R VALUE TEST SET SIZE (%) : 7.30 REMARK 3 BIN FREE R VALUE TEST SET COUNT : 162 REMARK 3 ESTIMATED ERROR OF BIN FREE R VALUE : 0.033 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 0 REMARK 3 NUCLEIC ACID ATOMS : 2029 REMARK 3 HETEROGEN ATOMS : 57 REMARK 3 SOLVENT ATOMS : 88 REMARK 3 REMARK 3 B VALUES. REMARK 3 FROM WILSON PLOT (A**2) : 139.30 REMARK 3 MEAN B VALUE (OVERALL, A**2) : 69.60 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 11.87000 REMARK 3 B22 (A**2) : 11.87000 REMARK 3 B33 (A**2) : -23.74000 REMARK 3 B12 (A**2) : 0.00000 REMARK 3 B13 (A**2) : 0.00000 REMARK 3 B23 (A**2) : 0.00000 REMARK 3 REMARK 3 ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM LUZZATI PLOT (A) : 0.39 REMARK 3 ESD FROM SIGMAA (A) : 0.39 REMARK 3 LOW RESOLUTION CUTOFF (A) : 5.00 REMARK 3 REMARK 3 CROSS-VALIDATED ESTIMATED COORDINATE ERROR. REMARK 3 ESD FROM C-V LUZZATI PLOT (A) : 0.48 REMARK 3 ESD FROM C-V SIGMAA (A) : 0.35 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES. REMARK 3 BOND LENGTHS (A) : 0.010 REMARK 3 BOND ANGLES (DEGREES) : 1.60 REMARK 3 DIHEDRAL ANGLES (DEGREES) : 17.30 REMARK 3 IMPROPER ANGLES (DEGREES) : 2.31 REMARK 3 REMARK 3 ISOTROPIC THERMAL MODEL : RESTRAINED REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. RMS SIGMA REMARK 3 MAIN-CHAIN BOND (A**2) : 1.380 ; 1.500 REMARK 3 MAIN-CHAIN ANGLE (A**2) : 2.560 ; 2.000 REMARK 3 SIDE-CHAIN BOND (A**2) : 1.630 ; 2.000 REMARK 3 SIDE-CHAIN ANGLE (A**2) : 2.610 ; 2.500 REMARK 3 REMARK 3 BULK SOLVENT MODELING. REMARK 3 METHOD USED : FLAT MODEL REMARK 3 KSOL : 0.88 REMARK 3 BSOL : 300.00 REMARK 3 REMARK 3 NCS MODEL : NULL REMARK 3 REMARK 3 NCS RESTRAINTS. RMS SIGMA/WEIGHT REMARK 3 GROUP 1 POSITIONAL (A) : NULL ; NULL REMARK 3 GROUP 1 B-FACTOR (A**2) : NULL ; NULL REMARK 3 REMARK 3 PARAMETER FILE 1 : DNA-RNA_REP.PARAM REMARK 3 PARAMETER FILE 2 : ION2.PARAM REMARK 3 PARAMETER FILE 3 : SAM3.PARAM REMARK 3 PARAMETER FILE 4 : WATER_REP.PARAM REMARK 3 PARAMETER FILE 5 : NULL REMARK 3 TOPOLOGY FILE 1 : DNA-RNA_REP.TOP REMARK 3 TOPOLOGY FILE 2 : ION2.TOP REMARK 3 TOPOLOGY FILE 3 : SAM3.TOP REMARK 3 TOPOLOGY FILE 4 : WATER_REP.TOP REMARK 3 TOPOLOGY FILE 5 : NULL REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL

REMARK 4 REMARK 4 2GIS COMPLIES WITH FORMAT V. 3.15, 01-DEC-08

REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 14-APR-06. REMARK 100 THE RCSB ID CODE IS RCSB037170.

REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : 11-NOV-05 REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : NULL REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : ALS REMARK 200 BEAMLINE : 8.2.1 REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 1.10532, 1.10573 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : ADSC QUANTUM 315 REMARK 200 INTENSITY-INTEGRATION SOFTWARE : BOS REMARK 200 DATA SCALING SOFTWARE : D*TREK REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 14940 REMARK 200 RESOLUTION RANGE HIGH (A) : 2.900 REMARK 200 RESOLUTION RANGE LOW (A) : 49.320 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : 3.000 REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : 99.6 REMARK 200 DATA REDUNDANCY : 14.640 REMARK 200 R MERGE (I) : 0.07200 REMARK 200 R SYM (I) : NULL REMARK 200 <I/SIGMA(I)> FOR THE DATA SET : 17.9000 REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : 2.90 REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : 3.08 REMARK 200 COMPLETENESS FOR SHELL (%) : 99.9 REMARK 200 DATA REDUNDANCY IN SHELL : 11.74 REMARK 200 R MERGE FOR SHELL (I) : 0.42600 REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 <I/SIGMA(I)> FOR SHELL : 4.400 REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: MAD REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MAD REMARK 200 SOFTWARE USED: CNS REMARK 200 STARTING MODEL: NULL REMARK 200 REMARK 200 REMARK: NULL

REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 52.20 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 2.57 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: NULL

REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: P 43 21 2 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,-Y,Z+1/2 REMARK 290 3555 -Y+1/2,X+1/2,Z+3/4 REMARK 290 4555 Y+1/2,-X+1/2,Z+1/4 REMARK 290 5555 -X+1/2,Y+1/2,-Z+3/4 REMARK 290 6555 X+1/2,-Y+1/2,-Z+1/4 REMARK 290 7555 Y,X,-Z REMARK 290 8555 -Y,-X,-Z+1/2 REMARK 290 REMARK 290 WHERE NNN -> OPERATOR NUMBER REMARK 290 MMM -> TRANSLATION VECTOR REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY REMARK 290 RELATED MOLECULES. REMARK 290 SMTRY1 1 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 1 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY3 1 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 2 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 2 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 1.000000 79.48350 REMARK 290 SMTRY1 3 0.000000 -1.000000 0.000000 31.45050 REMARK 290 SMTRY2 3 1.000000 0.000000 0.000000 31.45050 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 119.22525 REMARK 290 SMTRY1 4 0.000000 1.000000 0.000000 31.45050 REMARK 290 SMTRY2 4 -1.000000 0.000000 0.000000 31.45050 REMARK 290 SMTRY3 4 0.000000 0.000000 1.000000 39.74175 REMARK 290 SMTRY1 5 -1.000000 0.000000 0.000000 31.45050 REMARK 290 SMTRY2 5 0.000000 1.000000 0.000000 31.45050 REMARK 290 SMTRY3 5 0.000000 0.000000 -1.000000 119.22525 REMARK 290 SMTRY1 6 1.000000 0.000000 0.000000 31.45050 REMARK 290 SMTRY2 6 0.000000 -1.000000 0.000000 31.45050 REMARK 290 SMTRY3 6 0.000000 0.000000 -1.000000 39.74175 REMARK 290 SMTRY1 7 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY2 7 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 7 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 8 0.000000 -1.000000 0.000000 0.00000 REMARK 290 SMTRY2 8 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY3 8 0.000000 0.000000 -1.000000 79.48350 REMARK 290 REMARK 290 REMARK: NULL

REMARK 300 REMARK 300 BIOMOLECULE: 1 REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON REMARK 300 BURIED SURFACE AREA.

REMARK 350 REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS REMARK 350 GIVEN BELOW. BOTH NON-CRYSTALLOGRAPHIC AND REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN. REMARK 350 REMARK 350 BIOMOLECULE: 1 REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: MONOMERIC REMARK 350 APPLY THE FOLLOWING TO CHAINS: A REMARK 350 BIOMT1 1 1.000000 0.000000 0.000000 0.00000 REMARK 350 BIOMT2 1 0.000000 1.000000 0.000000 0.00000 REMARK 350 BIOMT3 1 0.000000 0.000000 1.000000 0.00000

REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT REMARK 500 REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT. REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI DISTANCE REMARK 500 O2' A A 20 O4' G A 21 2.13 REMARK 500 O2' A A 20 OP2 G A 21 2.18 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS REMARK 500 REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC REMARK 500 SYMMETRY ARE IN CLOSE CONTACT. AN ATOM LOCATED WITHIN 0.15 REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375 REMARK 500 INSTEAD OF REMARK 500. ATOMS WITH NON-BLANK ALTERNATE REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS. REMARK 500 REMARK 500 DISTANCE CUTOFF: REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI SSYMOP DISTANCE REMARK 500 N3 IRI A 201 N3 IRI A 201 7555 1.02 REMARK 500 IR IRI A 201 N3 IRI A 201 7555 2.10 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: COVALENT BOND LENGTHS REMARK 500 REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 STANDARD TABLE: REMARK 500 FORMAT: (10X,I3,1X,2(A3,1X,A1,I4,A1,1X,A4,3X),1X,F6.3) REMARK 500 REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999 REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996 REMARK 500 REMARK 500 M RES CSSEQI ATM1 RES CSSEQI ATM2 DEVIATION REMARK 500 G A 1 P G A 1 OP3 -0.078 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: COVALENT BOND ANGLES REMARK 500 REMARK 500 THE STEREOCHEMICAL PARAMETERS OF THE FOLLOWING RESIDUES REMARK 500 HAVE VALUES WHICH DEVIATE FROM EXPECTED VALUES BY MORE REMARK 500 THAN 6*RMSD (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN REMARK 500 IDENTIFIER; SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 STANDARD TABLE: REMARK 500 FORMAT: (10X,I3,1X,A3,1X,A1,I4,A1,3(1X,A4,2X),12X,F5.1) REMARK 500 REMARK 500 EXPECTED VALUES PROTEIN: ENGH AND HUBER, 1999 REMARK 500 EXPECTED VALUES NUCLEIC ACID: CLOWNEY ET AL 1996 REMARK 500 REMARK 500 M RES CSSEQI ATM1 ATM2 ATM3 REMARK 500 A A 9 C2' - C3' - O3' ANGL. DEV. = 12.3 DEGREES REMARK 500 A A 33 C2' - C3' - O3' ANGL. DEV. = 12.6 DEGREES REMARK 500 G A 50 C4' - C3' - O3' ANGL. DEV. = 13.7 DEGREES REMARK 500 G A 50 C2' - C3' - O3' ANGL. DEV. = 10.0 DEGREES REMARK 500 G A 50 N9 - C1' - C2' ANGL. DEV. = -8.2 DEGREES REMARK 500 U A 63 C2' - C3' - O3' ANGL. DEV. = 15.3 DEGREES REMARK 500 G A 74 C4' - C3' - O3' ANGL. DEV. = 12.7 DEGREES REMARK 500 G A 74 C2' - C3' - O3' ANGL. DEV. = 11.3 DEGREES REMARK 500 G A 74 N9 - C1' - C2' ANGL. DEV. = -7.3 DEGREES REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: PLANAR GROUPS REMARK 500 REMARK 500 PLANAR GROUPS IN THE FOLLOWING RESIDUES HAVE A TOTAL REMARK 500 RMS DISTANCE OF ALL ATOMS FROM THE BEST-FIT PLANE REMARK 500 BY MORE THAN AN EXPECTED VALUE OF 6*RMSD, WITH AN REMARK 500 RMSD 0.02 ANGSTROMS, OR AT LEAST ONE ATOM HAS REMARK 500 AN RMSD GREATER THAN THIS VALUE REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 M RES CSSEQI RMS TYPE REMARK 500 G A 19 0.05 SIDE_CHAIN REMARK 500 G A 35 0.06 SIDE_CHAIN REMARK 500 G A 50 0.07 SIDE_CHAIN REMARK 500 U A 67 0.08 SIDE_CHAIN REMARK 500 G A 74 0.08 SIDE_CHAIN REMARK 500 REMARK 500 REMARK: NULL

REMARK 620 REMARK 620 METAL COORDINATION REMARK 620 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 620 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE): REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 MG A 205 MG REMARK 620 N RES CSSEQI ATOM REMARK 620 1 A A 10 OP2 REMARK 620 2 U A 63 O3' 95.0 REMARK 620 3 U A 64 OP2 133.2 53.2 REMARK 620 N 1 2 REMARK 620 REMARK 620 COORDINATION ANGLES FOR: M RES CSSEQI METAL REMARK 620 MG A 206 MG REMARK 620 N RES CSSEQI ATOM REMARK 620 1 A A 84 O5' REMARK 620 2 A A 84 O3' 115.5 REMARK 620 3 A A 85 OP2 130.4 63.5 REMARK 620 4 A A 84 OP1 62.8 164.4 130.5 REMARK 620 N 1 2 3

REMARK 800 REMARK 800 SITE REMARK 800 SITE_IDENTIFIER: AC1 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG A 205 REMARK 800 SITE_IDENTIFIER: AC2 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE MG A 206 REMARK 800 SITE_IDENTIFIER: AC3 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE IRI A 201 REMARK 800 SITE_IDENTIFIER: AC4 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE IRI A 202 REMARK 800 SITE_IDENTIFIER: AC5 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE IRI A 203 REMARK 800 SITE_IDENTIFIER: AC6 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE IRI A 204 REMARK 800 SITE_IDENTIFIER: AC7 REMARK 800 EVIDENCE_CODE: SOFTWARE REMARK 800 SITE_DESCRIPTION: BINDING SITE FOR RESIDUE SAM A 301

DBREF 2GIS A 1 94 PDB 2GIS 2GIS 1 94

SEQRES 1 A 94 G G C U U A U C A A G A G SEQRES 2 A 94 A G G U G G A G G G A C U SEQRES 3 A 94 G G C C C G A U G A A A C SEQRES 4 A 94 C C G G C A A C C A G A A SEQRES 5 A 94 A U G G U G C C A A U U C SEQRES 6 A 94 C U G C A G C G G A A A C SEQRES 7 A 94 G U U G A A A G A U G A G SEQRES 8 A 94 C C A

HET MG A 205 1 HET MG A 206 1 HET IRI A 201 7 HET IRI A 202 7 HET IRI A 203 7 HET IRI A 204 7 HET SAM A 301 27

HETNAM MG MAGNESIUM ION HETNAM IRI IRIDIUM HEXAMMINE ION HETNAM SAM S-ADENOSYLMETHIONINE

FORMUL 2 MG 2(MG 2+) FORMUL 4 IRI 4(H18 IR N6 3+) FORMUL 8 SAM C15 H22 N6 O5 S FORMUL 9 HOH *88(H2 O)

LINK MG MG A 205 OP2 A A 10 1555 1555 2.88 LINK MG MG A 205 O3' U A 63 1555 1555 2.88 LINK MG MG A 205 OP2 U A 64 1555 1555 2.42 LINK MG MG A 206 O5' A A 84 1555 1555 1.93 LINK MG MG A 206 O3' A A 84 1555 1555 2.35 LINK MG MG A 206 OP2 A A 85 1555 1555 2.46 LINK MG MG A 206 OP1 A A 84 1555 1555 2.71

SITE 1 AC1 4 A A 9 A A 10 U A 63 U A 64 SITE 1 AC2 2 A A 84 A A 85 SITE 1 AC3 5 C A 31 G A 32 A A 33 U A 34 SITE 2 AC3 5 HOH A 448 SITE 1 AC4 6 G A 15 G A 16 U A 17 G A 18 SITE 2 AC4 6 A A 36 A A 38 SITE 1 AC5 6 G A 23 C A 25 U A 26 G A 27 SITE 2 AC5 6 G A 28 C A 29 SITE 1 AC6 6 U A 4 U A 5 A A 6 U A 88 SITE 2 AC6 6 G A 89 HOH A 475 SITE 1 AC7 11 U A 7 G A 11 A A 45 A A 46 SITE 2 AC7 11 C A 47 U A 57 G A 58 C A 59 SITE 3 AC7 11 U A 88 G A 89 HOH A 437

CRYST1 62.901 62.901 158.967 90.00 90.00 90.00 P 43 21 2 8

ORIGX1 1.000000 0.000000 0.000000 0.00000

ORIGX2 0.000000 1.000000 0.000000 0.00000

ORIGX3 0.000000 0.000000 1.000000 0.00000

SCALE1 0.015898 0.000000 0.000000 0.00000

SCALE2 0.000000 0.015898 0.000000 0.00000

SCALE3 0.000000 0.000000 0.006291 0.00000